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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebbcf19d0156628ebb5687085d3c351da6e72e9bba56b2e65a0f58423529fa87' 
  AND token = '96N++Nh6ha3RosQmjaAzoKX4m2y3wLaMUJqqC5XyxpU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}